dempster



2 Sheets- Sheet 1` (No Model.)

C. B. DBMPSTER, J. NVMGDOWELL 8u F. H. KLINE..

GEARING FOR WINDMILLS.

Patented Aug. 25, 1896.

uw@ w@ A G. B. DBMPSTER, J. N. MGDOWBLL 8v' F. H. KLINE.

GEARING FOR WINDMILLS. l

Patented Aug. 25, 1896.

mimonms versus co WOT UNITED i STATES PATENT @Erica CHARLES B. DEMPsrER,JQHN N. McDowELL, AND FRANK n. KLINE, oF

BEATRICE, NEBRASKA, AssieNoRs To riii-1E DEMPSTER MILL MANUFAC- TURINGCOMPANY, oF SAME PLACE.

GEARING FOR WINDNIILLS.

SPECIFICATION forming part of Letters Patent No. 566,380, dated .August25, 1896.

Application led January 11, 1896. Serial No. 575,127. (No model.)

To all whom, it may concern:

Be it known that we, CHARLES B. DEMr-A sTER, JOHN N. MoDowELL, and FRANKH. KLINE, citizens of the United States, residing at Beatrice, in thecounty of Gage and State of Nebraska, have invented certain new anduseful Improvements in Gearing for Windmills, of which the following isa full, clear, and exact descriptiomreference being ro had to theaccompanying drawings, forming a part of this specification.

Our invention relates to improvements in windmills, and it maybeembodied in a direct-stroke mill as well as a geared-back mill.

I5 An object of the invention is to utilize and control the powerderived from the revolution of the wind-wheel in such a way that nopower will be lost and so that the entire revolution of the wheel willbe active in liftzo ing the liquid being pumped.

A further object is to simplify and improve the general and detailconstruction of the mill whereby the operation thereof will be greatlyfacilitated and the capacity increased;

and a further object is to provide suitable means for maintaining thereciprocating shafts in their proper position irrespective of therotator-y movement of the mill.

Vith these and other ends in view our in- 3o vention consists of theconstruction and arrangement of devices and the peculiar combination ofparts, which will be fully and clearly pointed out and claimedhereinafter.

In the accompanying drawings, Figure lis a view, partly in section, of ageared-back mill embodying our invention. Fig. 2 is an end elevation.Fig. 3 is a side view of a direct-stroke mill to which our invention isapplied. Fig. 4. illustrates an internal and eX- 4o ternal gearing,either of which may be employed in connection with our improvements andFig. 5 is a sectional view showing the construction and arrangement ofthe reciprocating shafts.

Referring to the drawings, in which like letters of reference denotecorresponding parts in all the figures, A designates the tower or frameon which the `mill is supported, and it is surmounted by a suitable 5ocap-piece a, which is provided with a series between the rollers.

of antifriction-rollers a', mounted in the sockets a".

The mill-frame B is provided with a circular base Z9, which is arrangedto operate upon the cap-piece a and revolve freely thereon Beneath thebase is a hollow circular extension b', which fits in the upper end ofthe tower for a purpose hereinafter described. The frame is providedwith upwardly-projecting arms having suitable 6o bearings C thereon forthe counter-shafts c.

A supplemental frame D is secured on one side of the mill-frame, and themain shaft d is journaled in bearings d in said supplemental frame. Thewind or sail wheel is mounted on the outer end of this main shaft, butit is not considered necessary to show said wheel in the drawings, asany kind of wheel may be employed which will answer the purposes of theinvention. 7o

The main shaft carries two pinions E,which mesh with and are adapted .toactuate the gear-wheels c, mounted on the ends of the counter-shafts c.The inner opposing surfaces of these gear-wheels e constitute faceplatesto which the bearings F for the upwardly-extending 'pitman f and thedownwardlyextending pitman j" are attached. The upwardly-extendin gpitman f is secured loosely to the collar Gr, which is rigidly fas- 8otened to the solid vertical shaft c, and as said pitman is operated bythe gear-Wheel e it reciprocates the lvert-ical shaft.

In order to maintain the shaftginits proper vertical position, weprovide guide-rollers H, which are mounted in suitable bearings in avertical frame h, and this frame is held rigidly in place by the bracesh. As the shaft g is raised and lowered, it is guided by the rollers Hand prevented from binding in the 9o hollow shaft in which it worksbelow.

The downwardly-extending pitman j" is secured loosely to a collar J,rigidly fastened on the hollow shaftKbymeans of a set-screw j. Thecollar J is arranged snugly within the cylinder j', which is secured ina suitable manner in the hollow extension t of the base o and thus formsa guide for the hollow shaft K. This cylinder is provided with abaseplate 7c, which rests upon a bracket 7c on the roo tower. By thisarrangement and construe tion of parts, as the gear-wheels e revolve,the bearings F will always be in directly op posite points of a circlearound the imaginary continuation of the shafts c, and therefore thevertical shafts g K, actuated by the pitmen ff', will be given areciprocating stroke, whereby one rises as the other descends. Theshafts g K are connected to separate plungers in any well-known form ofdoubleacting pump.

In the construction heretofore described the main power-shaft rotatesseveral times to one revolution of the gear-wheels, but this gearing maybe changed and altered as desired. In Fig. 3 we have illustrated ourinvention as applied to a direct-stroke mill, in which one of thegear-wheels e is mounted on the main power-shaft d, and motion iscommunicated from said wheel to the other gearwheel through the mediumof the pinions E on the single counter-shaft c, and in Fig. l we haveshown how the invention can be used in connection with an internalback-geared windmill, in which L is the driving-pinion, Z thecounter-shaft pinion, and Z the face-plate, the said face-plate beingprovided with an internal gear R, which meshes with the drivingpinion L,and an external gear S,which meshes with the counter-shaft pinion Z.

In order that the frame may turn on the tower, so that the wind-wheelmay adjust itself according to the direction of the wind, we provideswivel-bearings to prevent the vertical shafts from twisting and gettingout of order. A swivel-bearing N is arranged on the divided solid shaftg, and it is connected with the upper end of the lower part of saidshaft bya rod n. The hollow vertical rod K is also divided, and aswivel-bearing k on the lower end of the upper part is connected to across-head n on the upper end of the lower part of said hollow shaft bythe side rods 7c. By this construction the mill is free to turn in anydirection without in any way affecting the lower parts of the dividedshaft.

We are aware that changes in the form and proportion of parts anddetails in the construction of our invention may be made withoutdeparting from the spirit or sacrificing the advantages thereof, and wetherefore reserve the right to make all such changes which fall withinthe scope and spirit of the invention.

Having thus described our invention, what we claim, and desire to secureby Letters Patent, is-

l. In a windmill, the combination with a main power-shaft, ofgear-wheels adapted to be driven by said power-shaft, the inner surfacesof said gear-wheels constituting faceplates, a solid vertical shaft, apitman connecting said solid shaft with one face-plate, a hollowvertical shaft, a cylinder arranged around said shaft, a collar Jsecured to the upper end of the hollow shaft and fitting snugly in saidcylinder, and a pitman connecting said collar and the other face-plate,substantially as described.

2. In a windmill, the combination with a main power-shaft, ofgear-wheels adapted to be driven by said power-shaft, the inner surfacesof said gear-wheels constituting faceplates, a solid vertical shaft,guides for said shaft, a collar on the shaft, a pitman connecting thecollar and one face-plate, a hollow vertical shaft, a cylinder aroundsaid shaft, a collar secured on the shaft and operating snugly in saidcylinder, and a pitman connecting said collar and the other faceplate,substantially as described.

3. In a windmill, the combination of a frame having a circular base, adownward circular extension on said base, a power-shaft mounted in theframe, gear-wheels adapted to be driven by said power-shaft, the innersurfaces of said gearwheels constituting face-plates, a vertical shaft,a pitman connecting said shaft and one face-plate, a hollow verticalshaft, a collar on said shaft, a pitman connecting said shaft and theother face-plate and a cylinder secured in the circular extension on thebase and forming a guide for said collar and hollow shaft, substantiallyas described.

4. In a Windmill, the combination with a main power-shaft, ofgear-wheels adapted to be driven by said power-shaft, the inner surfacesof said gear-wheels constituting faceplates, a solid vertical shaft anda hollow vertical shaft, pitmen connecting said shafts to theface-plates respectively, and a swivel forming a part of each of saidshafts, and located intermediate of the ends thereof substantially asdescribed.

5. In a windmill, the combination with a main power-shaft, ofgear-wheels adapted to be driven by said power-shaft, the inner surfacesof said gear-wheels constituting faceplates, a solid vertical shaft, aswivel in said shaft, a pitman connecting said shaft and one face-plate,a hollow vertical shaft divided into two parts, a swivel on the lowerend of the upper part, a cross-plate on the upper end of the lower part,the side rods connecting said swivel and cross-plate, and a pitmanconnecting said hollow shaft and the other face-plate, substantially asdescribed.

6. In a windmill, the combination with a main power-shaft, ofgear-wheels adapted to be driven by said power-shaft, the inner surfacesof said gear-wheels constituting'faceplates, a solid vertical shaftdivided into two parts, a swivel on the lower end of the upper part, arod connecting said swivel and the upper end of the lower part, a hollowvertical shaft divided into two parts, a swivel on the lower end of theupper part, a cross-plate on the upper end of the lower part, the siderods connecting said swivel and cross-plate, and a pitman connectingsaid hollow shaft and the other face-plate, substantially as described.

7. In a windmill, the combination with a IOO IISI

tease@ a" head, a solid vertioal shaft operating in the hollow Verticalshaft and divided into two parts, a swivel-bearing on one of said partsof the solid shaft, and a rod connecting the said swivel-bearing to theend of the other part, and means for operating said shafts,substantially as described.

CHARLES B. DEMPSTER. JOHN N. MCDOWELL. FRANK H. KLINE. Witnesses:

C. WM. MILLER, HARRY SGHAFER.

